牙轮的移轴距越大，牙轮的滑动量越小。
参考答案：错
解析：牙轮的移轴距越大，牙轮的滑动量越大。
Walking down the street the other day, _____.
A．I saw unusual something happened
B．a terrible accident happened
C．something unusual was seen by me
D．I saw a terrible accident
病毒感染的类型有几种，其分类依据是什么？
